﻿<p><em>IfcTShapeProfileDef</em> defines
a section profile that provides the defining parameters of a T-shaped
section to be used by the swept area solid. Its parameters and
orientation relative to the position coordinate system are according to
the following illustration. The centre of the position coordinate
system is in the profile's centre of the bounding box.</p>

<blockquote class="history">
HISTORY&nbsp; New entity in IFC2x2.
</blockquote>

<blockquote class="change-ifc2x3">
IFC2x3 CHANGE&nbsp; All profile origins are now in the center of the bounding box.
</blockquote>

<blockquote class="change-ifc2x4">
IFC4 CHANGE&nbsp; Type of <em>FilletRadius</em>, <em>FlangeEdgeRadius</em>, and <em>WebEdgeRadius</em> relaxed to allow for zero radius. Trailing attribute <em>CentreOfGravityInY</em> deleted, use respective property in <em>IfcExtendedProfileProperties</em> instead.
</blockquote>

<p>Figure 2 illustrates parameters of the T-shape profile definition.</p>

<table><tr><td>
<table border="1" cellpadding="2" cellspacing="2" width="100%">
  <tbody>
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      <td width="420">
<img
 src="../../../figures/ifctshapeprofiledef.gif" alt="T-shape profile"
 border="0" height="300" width="400">

      </td>
      <td valign="top">

<p><u>Position</u> <br>
The parameterized profile defines its own position coordinate system.
The underlying
coordinate system is defined by the swept area solid
that uses the profile definition. It is the xy plane of:</p>
      <ul>
        <li><small>IfcSweptAreaSolid.Position</small></li>
      </ul>
<p>by using offsets of the position location, the parameterized profile
can be positioned centric (using x,y offsets = 0.), or at any position
relative to the profile.</p>

      </td>
    </tr>
  </tbody>
</table>
</td></tr>
<tr><td><p class="figure">Figure 2 &mdash; T-shape profile</p></td></tr>
</table>